The person who grieves suffers his passion to grow upon him he indulges it he loves it but this never happens in the case of actual pain which no man ever willingly endured for any considerable time.
Realize that if you have time to whine and complain about something then you have the time to do something about it.
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By recollecting the pleasures I have had formerly I renew them I enjoy them a second time while I laugh at the remembrance of troubles now past and which I no longer feel.